LLVM Compiler Infrastructure: 2025 Technical Summary and ptradd Migration Progress
By
asb
Hot, fresh, and worth queueing round the block for.
Summary
This article is a yearly technical summary from a LLVM compiler contributor covering their work in 2025. The author discusses progress on migrating from type-based getelementptr (GEP) representation to a ptradd instruction for pointer arithmetic, which has been an ongoing multi-year effort. The summary focuses on significant, high-level technical developments in LLVM compiler infrastructure from the author's personal contributions and perspective.
Key quotes
· 4 pulledI have been making slow progress on the ptradd migration over the last three years.
The goal of this change is to move away from the type-based getelementptr (GEP) representation, towards a ptradd instruction, which just adds an integer offset to a pointer.
As usual, this summary is about my own work, and only covers the more significant / higher-level items.
It's 2026, so it's time for my yearly summary blog post. I'm a bit late, but at least it's still January!
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